Separator member.



K. DOUGAN.

SEPARATOR MEMBER.

APPLICATION FILED SEPT. 30. 1914.

Patented May 30, 1916.

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Wf/nesses K. DOUGAN.

SEPARATOR MEMBER.

APPLICATION FILED SEPT. 30, 1914.

1 ,185,6 1 1. Patented May 30, 1916.

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K. DOUGAN.

SEPARATOR MEMBER.

APPLICATION FILED SEPT. 30. 1914.

Patented May 30, 1916.

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' Continuation of application Serial No.'640,669, filed July 26, 1911.

KENNEDY DOUGAN, OF MINNEAPOLIS, MINNESOTA.

SEPARATOR MEMBER.

Specification of Letters Patent.

Patented May 30, 1916.

This application filed September 30,

1914. Serial No. 864,240.

To all whom it may concern:

Be it known that I, KENNEDY DoUGAN, a citizen of the United States, residing at Minneapolis. in the county of Hennepin and State of Minnesota, have invented certain new and'useful Improvements in Separator Members, of which the following is a specification.

My invention relates to means for imparting slight vibratory movements to separator members having a characteristic normal movement.

The invention is particularly applicable to sieve bolters for bolting flours and other products in flour mills, to sieves and grain cleaning machinery and to jigs and concentrator tables in quartz mills for making separations in reducing ores. In the above classes of machinery the separating body, whether sieve bolter or concentrator table, is given a regular movement, either vibratory or gyrato-ry, this movement having the effect of moving the material operated on upon the surface of the sieve or table so as to effect the desired separation. My invention applied to such devices has the effect of giving a very rapid tremble or movement differentiated from the regular movement of the machine which very greatly increases the efficiency of any of said machines. This trembling movement is effected by small unbalanced weights secured to a shaft or shafts journaled so as to extend along the sieve or shaking table and which are caused to rotate rapidly. The movement of the weights e ecting a change in direction of the centrifugal force thereof causes the tremble or secondary vibration.

The full objects and advantages of my in-. vention will appear in connection with the detailed description thereof and are particularly pointed out in the claims.

In the drawings, illustrating a form of application of my invention,Figure 1 is a diagrammatic side elevation of a gyrating body such as a flour sieve having my improvements connected therewith. Fig. 2

is a plan view of Fig. 1.viewed from the bottom. Fig. 3 is a side elevation view' of a modification. Fig. 4 is a bottom plan view of the parts shown in Fig. 3. Fig. 5 is a side view of a gyrating device having my vibrating device applied with the shafts parallel with the vibrating driving mechanism. Figs. 6, 7 and 8 are plan, side elevation and end elevation views, respectively, of a vibrating concentrator table having my improvements secured thereto. Figs. 9 and 10 are an end elevation view and a fragmentary side elevation showing the manner of applying the secondary vibrating means similar to that illustrated in Fig. 5. Figs. 11 and 12 are elevation and plan views, respectively, of a modified means of driving the secondary vibrator in connection with a vibrating table.

As illustrated in Figs. 1 and 2, the sievebox or bolter 15 is suspended in a wellknown manner by reeds 16. A vertical shaft 17 is journaled in box 15, having thereon a pair of unbalanced wheels 18, 19 each provided with a weighted portion 20 by which the unbalancing effect is secured. The shaft 17 is connected by means of link 21 and universal joints 22 and 23 with a shaft 24 constantly driven from a pulley 25. A rotation of shaft 17 by reason of the unbalanced wheels 18, 19 causes the box 15 to gvrate. All of the above is in accordance with wellknown methods of operation.

My improvements, as shown in Figs. 1 and 2, comprise a shaft 26 journaled transversely in the box 15 and provided with a pair of weighted arms 27. A belt 28 runs from pulley wheel 19 to a pulley 29 on a vertical shaft 30 journaled upon the side of the sieve-box 15. The shaft 30 has therei on a pulley 31, which through belt 32 and pulley 33 fast on shaft 26, rotates said shaft at the desired speed. The rotation of this shaft carrying around weighted arms 27, has the efi'ectof giving to the box 15 a secondary vibration or tremble, a part of the movement of which will take place in planes transverse to the plane of gyration, or, in effect, vertically. This movement Will be in effect a secondary gyration in a vertical plane.

As illustrated in Figs. 3 and 4, gyratory movement is imparted to the sieve-box 15 by means of a crank shaft 34 journaled in said sievebox and driven from a pulley 35. In this form a pair of transverse shafts 36 and 37 are provided each having thereon weighted arms 27. From apulley 38 on shaft 34, by means of a belt 39 running to a pulley 40 on a horizontal shaft 41 journaled .upon the bottom of the sieve-box 15, said shaft 41 is rapidlv rotated. This shaft has thereon a pulley 42, which, through belt 43 and pulley 44 on shaft 36, drives said shaft 36 at the desired rate of speed. Shafts 36 and 37 ,are geared together by means of spur gears 45 and 46 'fast on said shafts. It is to be noted that the gearing in this case is such that the sets of arms 27 on the respective shafts 36 and 37 are caused to move in opposite directions, alternately approaching and receding from one another and taking the position s wn in Fig. 4 once for each revolution of these shafts. This has the effect of neutralizing the unbalancing action in a horizontal plane, although the weights 27 will operate to gether in effecting vibration of'the sievebox 15 in a vertical plane. In this form, therefore, the secondary vibration will not be gyratory but will be atrue vibration in a vertical plane.

In the form of my invention shown in Fig. 5, an elongated sieve-box 47 is shown suspended and driven in the same manner as the device shown in Fig. 1. In this form of box or bolting machine-a plurality of sieves, one above the other,.are usually employed, and the secondary vibration must not be of a character which would tend to move the stock on" the sieves in one direction. As shown, I have journaled a pair of shafts 48 and 49 vertically in the sievebox, each of said shafts being provided with weighted arms 27. The shaft 48 'is driven by a belt 50 from pulley 18, while the shaft 49 is driven by means of a pinion 51 thereon meshing with a spur gear 52 on shaft 17. The two shafts 48 and 49 are, by these means, driven at the same rate in opposite directions and the gearing is such that the sets of arms 27 on these shafts alternately approach and recede from one another, thus causing'a secondary transverse vibration of sieve box 47.

In Figs. 6, 7 and 8 my device is shown applied to a shaking table for ore separation, the same being somewhat diagrammatically indicated. As there shown, a table 54 is supported by legs 55 which are of spring material, permitting an oscillation or shaking movement of the table. This is effected by means of pitmen 56 pivoted to the table and operated by a crank shaft 57 driven from any desired source of power. naled in hangers 58, secured to the table 56, is a longitudinal shaft 59 which has thereon a series of spiral gears 60. Each of the spiral gears 60 meshes with a spiral pinion or worm 61 on shafts 62, 63, 64 and 65. Upon these shafts are secured the weighted arms 27, similar to those already described, each set on any shaft extending in parallel relation at one side only of said shaft. The

shaft 59 has thereon a pulley 66, and the shaft 57 is provided with a pulley 67.. A

belt 68 runs over pulleys 67 and 66, passing first beneath a pair of idler pulleys 69 jour- J our- 7 naled on a short shaft upon the base support'of the machine. By this means the shaft 59 may be constantly driven at the desired speed, the belt 68 remaining tight and in operative engagement with pulley 66 by reason of the fact that the runs 90 of said belt extending between idlers 69 and pulley 66 oscillate with the box 54 about the shaft 70 as a center. As indicated in Fig. 8, a single shaft 62 with one set of arms 27 may be employed, or a plurality of shafts, as shown in Figs. 6 and 7, may be employed. In this form of device it is preferable that these shafts be so geared to the driving means in relation to the arms 27 that adjacent pairs of shaftswill travel in opposite directions and the arms 27 will approach and recede from one another so as to neutralize horizontal movements and permit the vertical tremble or vibration. Also, to facilitate said vertical tremble the spring supports 55 are provided with bowed portions 71. Of course if desired, a plurality of shafts may be employed all rotating in the same direction with the weighted arms 27 extending in parallel relation, in which case, as in the case of the employment of a single unbalanced shaft, the secondary vibration will be gyratory in a vertical plane.

As shown in Figs. 9 and 10, shafts 72 and 73 are journaled in vertical relation to the sides of shaking box 54 and provided with weighted arms 27 extending in the same direction from said shafts. The shafts 72 and 73 are provided wth a worm or spiral pinion 75 which is driven byspiral gears 76 on a shaft 77 journaled transversely of shaking table 54. The shaft 77 has thereon a pulley 78 which is driven by a' belt 79 from a pulley 80 on a shaft 81 extending longitudinally of the table 54, belt 79 running under idler pulleys 82 similar to idlers 69. The arms 27 on shafts 72 and 73 are so related in connection with the driving mech- As illustrated in Figs. 11 and 12, the table 54 may be supported by links or reeds 83 same as the forms shown in Figs. 6 and In this case a single shaft 84 is shown extending transversely of the table 54 and having thereon the arms 27 extending in parallel relation. The shaft 84 has thereon alpuiley 85, by means of which the shaft 84 i fs' driven by belt 86 running over pulley 87 on a fdriven shaft 88 journaled above the table-54. r

In each of the forms of application of my invention given above,, it will be seen from above and driven by pitinen 56,"' thef12o that the essential principle is the same. That is, a separating body such as a flour bolter, grain sieve or shaking table for ore concentrators has a normal movement for effecting separation of the material acted upon. This movement in the case of sieves and bolters is quite generally gyratory; in the case of shaking tables for ore concentrators it is quite generally vibratory, or a short, definitely timed reciprocation. The use of the additional unbalanced shafts in any of these forms of evices, said shafts being rotated at a rel tively very high speed, results in giving to the separating body a supplementary vibratory movement, which, being out of time with the normal movement and being very quick in its char.- acter, in fact substantially a tremble, has the effect of displacing the material to a small degree and in a rapid manner in addition to the displacement effected by the normal movement of the separating body. This results in enormously increased efficiency of said separating body.

In the case of shaking tables for ore concentrators, which are often of considerable length, I contemplate applying my invention in the manner shown in Figs. 6 and 7 to the front or receiving end of the concentrator table, and in the manner shown in Fig. 9 to the rear or discharge end of the concentrator table. Inthis manner the heavier material at the start is given opportunity to settle quickly through the lighter substances, and is less disturbed from its settled position as it approaches the discharge end of the separator table.

I claim:

1. The combination with a separator member and means for giving the same a normal movement of fixed character, of means movable with said separator member for imparting thereto a supplementary movement of a different character and out of time with the first-named movement.

2. The combination with a separator member and means for giving the same a normal movement of fixed character, of a shaft adapted to rotate in bearings secured on said member, an unbalanced weight carried by said shaft, and means for rotating the shaft.

3. The combination with a separator member and means for giving the same a normal movement of fixed character, of a shaft adapted to rotate in bearings secured on said member, an unbalanced weight carried by said shaft, and means movable with the member for rotating said shaft.

4. The combination with a separator member and means for giving the same a normal movement of fixed character, of a weightedshaft carried by the member for imparting a short vibratory motion or tremble to the member, and means for driving said shaft operated by the means for giving the member the continuous motion.

5. The combination with a separator member and means for giving the same a. continuous normal movement, of means movable with said separator member for imparting thereto a short vibratory motion or tremble in planes at right angles to the plane of said normal movement.

' 6. The combination with a separator member and means for giving the same a continuous normal movement, of a weighted shaft mounted on said separator member so that when rapidly rotated it will impart a short vibratory motion or tremble to the member in planes at right angles to the plane of said normal movement, and means for rotating said shaft.

7. The combination with a separator member and means for giving the same a continuous normal movement, of a weighted shaft journaled on said separator member so that when rapidly rotated it will impart a short vibratory motion or tremble to the member in planes at right angles to the plane of said normal movement, and means operated by said first-named moving means for rotating the shaft.

8. The combination with a separator member and means for giving the same a continuous normal motion, of a plurality of weighted shafts journaled on said member, the weights thereof having such relation that when the shafts are rapidly rotated they will impart a short vibratory motion or tremble to the member in one direction only at right angles to the plane of the normal motion, and means for operating the shafts.

9. The combination with a separator member and means for giving the same a continuous normal motion, of a plurality of shafts mounted on said member and having weighted arms extended from said shafts in such'directions relatively that when said shafts are rotated in opposite directions they will impart a short vibratory motion or tremble to the member, and means for rotating the shafts in opposite directions.

10. The combination with a separator member and means for giving the same a normal motion', of a pair of shafts mounted on said member in spaced relation with the normal center of the member falling between said shafts, weighted arms on the shafts having such relation that when the shafts are simultaneously rotated they will impart a short vibratory motion or tremble to the member in one direction only at right angles to the plane of the normal motion, and means for operating the shafts.

11. The combination with a separator member and means for giving the same a normal motion, of a horizontal shaft adapted to rotate in bearings secured on said memrality of horizontal shafts journaled on the member and symmetrically positioned with respect to the transverse middle line thereof, unbalanced weights carried by all of said shafts, and means operated by said firstnamed moving means for simultaneously rotating all of said shafts.

14. The combination with a separator member and means for giving the same a characteristic normal movement, of a plurality of shafts journaled in parallel relation upon said separator member, and means operated by said first-named moving means for simultaneously rotating all said shafts.

15. The combination with a separator member and means for giving the same a characteristic normal movement, of a plurality of shafts extending to each side of the member, radially extended arms provided with weights at their outer ends mounted upon the ends of the shafts, and means for rapidly rotating the shafts for imparting the vibratory motion or tremble to the separator member of a different character and out of time with the first-named movement.

16. The combination with a shaking table and a driving shaft for operating the same, of a weighted shaft mounted on the table, and means for driving said last-named shaft from the driven shaft to impart a short vibratory motion or tremble to the shaking table in addition to its reciprocatory motion.

17. The combination with a shaking table and a driving shaft for operating the same, of a plurality of weighted shafts mounted on said table, a spiral gear on each of said shafts, a transversely mounted shaft'on the table having a series of spiral pinions meshing with said spiral gears, and means for driving the transversely mounted shaft from the driven shaft.

18. The combination with a separator member and means for giving the same a normal movement of fixed character, of-

means movable with said separator member for imparting a short vibratorymotion or tremble to the member in one direction only, at right angles to the plane of the normal motion.

19. The combination with a separator member and means forgiving the same a normal movement of fixed character, a constantly moving member mounted upon said separator member for imparting thereto a supplemental movement of a different character, and means for moving said last named member while the separator member is undergoing its said normal movement.

In testimony whereof I afiix my signature in presence of two witnesses.

KENNED Y DOUGAN.

Witnesses: I

F. A. WHITELEY, A. M. ROYAL. 

